1 files changed, 164 insertions, 0 deletions
diff --git a/al/eax_fx_slot_index.cpp b/al/eax_fx_slot_index.cpp
new file mode 100644
index 00000000..dffaef47
--- /dev/null
+++ b/al/eax_fx_slot_index.cpp
@@ -0,0 +1,164 @@
+#include "eax_fx_slot_index.h"
+
+#include "eax_exception.h"
+
+
+namespace
+{
+
+
+class EaxFxSlotIndexException :
+    public EaxException
+{
+public:
+    explicit EaxFxSlotIndexException(
+        const char* message)
+        :
+        EaxException{"EAX_FX_SLOT_INDEX", message}
+    {
+    }
+}; // EaxFxSlotIndexException
+
+
+} // namespace
+
+
+EaxFxSlotIndex::EaxFxSlotIndex(
+    EaxFxSlotIndexValue index)
+{
+    set(index);
+}
+
+EaxFxSlotIndex::EaxFxSlotIndex(
+    const EaxFxSlotIndex& rhs) noexcept
+    :
+    has_value_{rhs.has_value_},
+    value_{rhs.value_}
+{
+}
+
+void EaxFxSlotIndex::operator=(
+    EaxFxSlotIndexValue index)
+{
+    set(index);
+}
+
+void EaxFxSlotIndex::operator=(
+    const GUID& guid)
+{
+    set(guid);
+}
+
+void EaxFxSlotIndex::operator=(
+    const EaxFxSlotIndex& rhs) noexcept
+{
+    has_value_ = rhs.has_value_;
+    value_ = rhs.value_;
+}
+
+bool EaxFxSlotIndex::has_value() const noexcept
+{
+    return has_value_;
+}
+
+EaxFxSlotIndexValue EaxFxSlotIndex::get() const
+{
+    if (!has_value_)
+    {
+        throw EaxFxSlotIndexException{"No value."};
+    }
+
+    return value_;
+}
+
+void EaxFxSlotIndex::reset() noexcept
+{
+    has_value_ = false;
+}
+
+void EaxFxSlotIndex::set(
+    EaxFxSlotIndexValue index)
+{
+    if (index >= static_cast<EaxFxSlotIndexValue>(EAX_MAX_FXSLOTS))
+    {
+        fail("Index out of range.");
+    }
+
+    has_value_ = true;
+    value_ = index;
+}
+
+void EaxFxSlotIndex::set(
+    const GUID& guid)
+{
+    if (false)
+    {
+    }
+    else if (guid == EAX_NULL_GUID)
+    {
+        has_value_ = false;
+    }
+    else if (guid == EAXPROPERTYID_EAX40_FXSlot0 || guid == EAXPROPERTYID_EAX50_FXSlot0)
+    {
+        has_value_ = true;
+        value_ = 0;
+    }
+    else if (guid == EAXPROPERTYID_EAX40_FXSlot1 || guid == EAXPROPERTYID_EAX50_FXSlot1)
+    {
+        has_value_ = true;
+        value_ = 1;
+    }
+    else if (guid == EAXPROPERTYID_EAX40_FXSlot2 || guid == EAXPROPERTYID_EAX50_FXSlot2)
+    {
+        has_value_ = true;
+        value_ = 2;
+    }
+    else if (guid == EAXPROPERTYID_EAX40_FXSlot3 || guid == EAXPROPERTYID_EAX50_FXSlot3)
+    {
+        has_value_ = true;
+        value_ = 3;
+    }
+    else
+    {
+        fail("Unsupported GUID.");
+    }
+}
+
+EaxFxSlotIndex::operator EaxFxSlotIndexValue() const
+{
+    return get();
+}
+
+[[noreturn]]
+void EaxFxSlotIndex::fail(
+    const char* message)
+{
+    throw EaxFxSlotIndexException{message};
+}
+
+
+bool operator==(
+    const EaxFxSlotIndex& lhs,
+    const EaxFxSlotIndex& rhs) noexcept
+{
+    if (lhs.has_value() != rhs.has_value())
+    {
+        return false;
+    }
+
+    if (lhs.has_value())
+    {
+        return lhs.get() == rhs.get();
+    }
+    else
+    {
+        return true;
+    }
+}
+
+bool operator!=(
+    const EaxFxSlotIndex& lhs,
+    const EaxFxSlotIndex& rhs) noexcept
+{
+    return !(lhs == rhs);
+}